Fill pan 1/2 way with water, add salt. Boil on number 9, reduced to 7 before you add your pasta.
Prepare the Pasta: Cook the spaghetti according to the package instructions until al dente. Drain - KEEP THE WATER and set aside.
Preheat the frying pan No 5 (medium)
Peel and finely dice the onion, peppers and celery.
Add the celery, onion and green pepper. Sauté until soft and fragrant. 5- 7 mins
Mince the garlic and thinly slice the chilli.
Add this to the frying pan and cook for 1- 2 mins.
Spice it Up: Stir in the tomato puree, black vinegar, gochujang paste, chili soybean paste, honey, smoked paprika, and the dried herbs. Cook for 1-2 minutes until well combined.
Add 1 ladle full of the pasta water to the pan.
Cover and Simmer the sauce for 8-10 minutes, allowing the flavours to meld together and the water to reduce.
Melt a knob of butter into the sauce to finish.
Combine: Toss the cooked spaghetti with the spicy arrabbiata sauce until evenly coated.
Serve: Divide the pasta between two plates. Garnish with dried chili flakes, fresh basil, and sprinkle of parmesan cheese for an extra layer of flavour.